package com.walmartlabs.concord.server;

/*-
 * *****
 * Concord
 * -----
 * Copyright (C) 2017 - 2020 Walmart Inc.
 * -----
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * =====
 */

import java.util.Collections;
import java.util.Map;
import java.util.UUID;

public final class RequestContext {

    private static final ThreadLocal<RequestContext> holder = new ThreadLocal<>();

    public static void set(UUID requestId, String remoteAddr, Map<String, String> extraHeaders) {
        RequestContext ctx = new RequestContext(requestId, remoteAddr, extraHeaders);
        holder.set(ctx);
    }

    public static void clear() {
        holder.remove();
    }

    public static RequestContext get() {
        return holder.get();
    }

    private final UUID requestId;
    private final String remoteAddr;
    private final Map<String, String> extraHeaders;

    private RequestContext(UUID requestId, String remoteAddr, Map<String, String> extraHeaders) {
        this.requestId = requestId;
        this.remoteAddr = remoteAddr;
        this.extraHeaders = Collections.unmodifiableMap(extraHeaders);
    }

    public UUID getRequestId() {
        return requestId;
    }

    public Map<String, String> getExtraHeaders() {
        return extraHeaders;
    }

    public String getRemoteAddr() {
        return remoteAddr;
    }
}
